Thanks Xcrispi for that response - I checked and that Eco Plus pump was not adjustable so I ordered another, a Via Aqua 306 adjustable which can do 0-596 gph. The reason I wanted a little more powerful is that I will be feeding it back into the the top res and need the head to be at least 3-4 feet...hopefully I can adjust the via aqua to be a good balance. Thanks again - you probably saved me a week of headache and maybe a smoked pump!